Basicly, the resistance of soil is based on moisture content, because it is the moisture that provides the conductivity from particle to particle, not the mineral or other dry content of the soil. avrFreak Ralph Hilton wrote: > > On Thu, 18 Oct 2007 12:27:59 -0500 you (Thomas Keller > <tjkeller1@alltel.net <mailto:tjkeller1%40alltel.net>>) > wrote: > > I was wondering how a simple resistance measurement could > differentiate between > a moist soil with low nutrient content and a drier soil containing a > lot of > soluble nutrients. >
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Re: [AVR-Chat] soil moisture sensor
2007-10-18 by Thomas Keller